data clean room
C2CEFR level
90/100Rarity: very rare
TechnicalRegister
A secure environment where two parties match audience data without exposing raw records to each other.
We ran the campaign match through a data clean room so neither side ever saw the other's customer list.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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